Rachel Alexandra, runaway winner by a record 20 1/4 lengths in the Kentucky Oaks on May 1, was purchased by Jess Jackson’s Stonestreet Stables on Wednesday, May 6. Jackson, majority owner of all-time leading money earner Curlin, purchased the filly from L and M Partners for an undisclosed price, reputed to be $10 million.

According to a Churchill Downs release by Gary Yunt, the filly was transferred from trainer Hal Wiggins’ Barn to that of Steve Asmussen at 5:15 a.m., Thursday, May 7.

“The ink is not even dry yet,” said Jackson, founder and former chairman of Kendall Jackson Wines. “The only decision was to bring her to Steve’s barn. No decision has been made on any race or a rider. Basically the same team is in place as we had with Curlin, and like Curlin, we will let her decide when she runs and where.”

Asmussen saddled Curlin, earner of $10.5 million, to win the 2007 Preakness Stakes and the 2007 Breeders Cup Classic. Now race fans are waiting to see if Jackson will supplement Rachel Alexandra (at a cost of $100,000) to the Preakness on May 16, at Pimlico Race Course in Baltimore. Four fillies have won the famous race, but the last was Rhine Maiden in 1915.

Rags to Riches, in 2007, was the first filly since 1905 to win the Belmont Stakes, and she did it by defeating Curlin.

Calvin Borel, who piloted 50 to 1 shot Mine That Bird to win the Kentucky Derby, also was aboard Rachel Alexandra for her Kentucky Oaks triumph, and it remains to be seen which horse he would ride in the Preakness, if Rachel Alexandra were supplemented for the race.

“It could happen,” said Mine That Bird’s trainer, Chip Woolley, referring to the possibility of losing the services of Borel for the Preakness. “But I don’t think I will have a hard time finding a rider, if it happens.”

Rachel Alexandra, sired by Medaglia Doro, has won seven of 10 career starts for earnings of $958,345, including $336,914 for the Kentucky Oaks.